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Optical Engineering

Comparisons of performances for brightness changes of target scenes between nonlinear joint transform correlators that use input images with pure amplitude, pure phase, and complex data
Author(s): Yasuhiro Iwamoto; Takumi Minemoto
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Paper Abstract

The performance of two nonlinear joint transform correlators?the binary subtracted joint transform correlator and the photorefractive-based subtracted joint transform correlator, has been tested by computer simulations under brightness changes of various target scenes. The input images used in the study were composed of pure- amplitude, pure-phase, and complex data, respectively. Also the performance for input images with complex data transformed by a spatial light modulator that uses the electroabsorption effect of GaAs single crystal has been compared with the mentioned results. The input images with pure-phase and complex data gave better results than those with pure- amplitude data, for various input images with the brighter target scenes. However, the input images with pure-amplitude data were most robust to brightness changes of target scenes.

Paper Details

Date Published: 1 January 2002
PDF: 9 pages
Opt. Eng. 41(1) doi: 10.1117/1.1425787
Published in: Optical Engineering Volume 41, Issue 1
Show Author Affiliations
Yasuhiro Iwamoto, Kobe Univ. (Japan)
Takumi Minemoto, Kobe Univ. (Japan)

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